<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<select>
    <script>
        var arr =["鼠","牛","虎","兔","龙","蛇","马","羊","猴","鸡","狗","猪"];
        for(var i=0;i<arr.length;i++){
            document.write("<option>"+arr[i]+"</option>");
        }
    </script>
</select>
</body>
</html>